Which command, tool or service on a UNIX network converts names to IP addresses and IP addresses to names, and can also specify which servers are mail servers?
A.
Port scanner
B.
Traceroute
C.
Host
D.
Nslookup
Explanation:
The Host command can provide these functions.
Incorrect Answers:
A: A port scanner is used to check well known ports to find out which services are running at a particular target node.
B: Traceroute is used to trace the network hops and nodes between the host issuing the command and the target IP address. This is a diagnostic tool based on ICMP.
D: NSLookup is used to lookup names in a DNS server. It will provide information, including IP addresses and mail servers, but only if the name is registered in DNS.
NSLookup can point to a specified name server.